A N 
A C C O -U N T 
O F SOM E 
THERMO M £ T R IGAL EXPERIMENTS; 
CONTAINING, 
I. Experiments relating to the cold -produced 'by the evaporation 
of various fluids, with a method of purifying ether, 
il. Experiments relating to the expanlion of mercury* 
III. Defcription of a thermometrical barometer. 
By TIBERIUS C A V A L L 0, F. R. S„ 
Who was nominated by the Prefldent and Council to profecute 
Difcoveries in Natural Hiftory, purfuant to the Will of the late 
HENRY BAKER, Efq. F. R e $„ 
Read at the ROYAL SOCIETY, June 28, vj 8t, 
